diff --git a/slither/printers/summary/external_calls.py b/slither/printers/summary/external_calls.py
index 647641838..03203e7bf 100644
--- a/slither/printers/summary/external_calls.py
+++ b/slither/printers/summary/external_calls.py
@@ -33,14 +33,14 @@ def output(self, _):
                     for target_contract, target_function in node.high_level_calls:
 
                         row = [
-                            f"{contract.name}.{function.name} {node.source_mapping.lines}",
+                            f"{function.canonical_name} {node.source_mapping.to_detailed_str()}",
                             f"{target_contract.name}.{target_function}",
                         ]
 
                         if function.all_reachable_from_functions:
 
                             for source in function.all_reachable_from_functions:
-                                chain = f"{source.contract.name}.{source.name} -> {contract.name}.{function.name}"
+                                chain = f"{source.canonical_name} -> {function.canonical_name}"
                                 table.add_row(
                                     [
                                         *row,